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Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects: Commons. Free media repository. MediaWiki. Wiki software development. Meta-Wiki. Wikimedia project coordination. Wikibooks. Free textbooks and manuals.
Wikipedia [c] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.Wikipedia is the largest and most-read reference work in history, [3] [4] and is consistently ranked among the ten most visited websites; as of August 2024, it was ranked fourth by Semrush, [5] and seventh by ...
Worldwide timelines by month and year. The 2019 and January 2020 timeline articles include the initial responses as subsections, and more comprehensive timelines by nation-state are listed below this section. Cases. Deaths. The following are the timelines of the COVID-19 pandemic respectively in: 2019. 2020.
As of June 2022, Omicron had about 50 mutations relative to the Wuhan-Hu-1 or B variant, [122][123] which is more than any previous SARS-CoV-2 variant. Thirty-two of these pertained to the spike protein, which most vaccines target to neutralise the virus. [124]
ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest. It is the first part of the ISO 3166 standard published by the International Organization for ...
January 1–20, 2020. On January 3, CDC Director Robert Redfield was notified by a counterpart in China that a "mysterious respiratory illness was spreading in Wuhan [China]"; he notified HHS Secretary Alex Azar, who shared the report with the National Security Council (NSC).
Around 5–15% of identical twin pregnancies [2] Twin-to-twin transfusion syndrome (TTTS), also known as feto-fetal transfusion syndrome (FFTS), twin oligohydramnios-polyhydramnios sequence (TOPS) and stuck twin syndrome, is a complication of monochorionic multiple pregnancies (the most common form of identical twin pregnancy) in ...
